Click "Subscribe" and wait for the green initial confirmation text to appear. Then close this form. If you don' get a "Please Confirm Subscription" email in a few minutes: please check your spam folder.

This is a somewhat smaller, lighter and more powerful
version of the celebrated 31 Nagler Type 5. Why? Because customers such as Tom
Dietz, from the Smithsonian, are pests! :-) It weighs about 1.6 lbs and has a
field stop diameter of 35mm. It is parfocal with the 17mm Nagler Type 4,
making it a nice match in size, weight and convenience.

Why Are There 3 Types of Naglers?

To achieve the full magnification range over 82° apparent field of view requires two types: Nagler Type-5 with focal lengths of 31, 16mm and Nagler Type-6 with focal lengths of 13, 11, 9, 7, 5, 3.5, 2.5mm.

The Type-5 permits the largest true field possible (31mm has 42mm field stop).

Type-6 models have shorter focal lengths, are parfocal, with similiar size and weight, and all with a comfortable 12mm eye relief.

The Type-4 models feature about 18mm of eye relief and with the "instajust" eyeguard are best for eyeglass wearers or Dioptrx users in their 22, 17, 12mm focal length range.